package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import com.sky.utils.JwtUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.math.BigInteger;
import java.nio.charset.StandardCharsets;
import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    private static final Logger log = LoggerFactory.getLogger(EmployeeServiceImpl.class);
    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // 这里使用了DigestUtils.md5DigestAsHex(password.getBytes(StandardCharsets.UTF_8))
        //将密码进行MD5加密
        String passwordMd5 = DigestUtils.md5DigestAsHex(password.getBytes(StandardCharsets.UTF_8));
        log.info("employeeService:密码比对，用户名：{}，数据库密码：{}，前端密码：{}", username, employee.getPassword(), passwordMd5);
        if (!passwordMd5.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    @Override
    public void startOrStop(Integer status, Long id) {
        Employee employee = new Employee();
        employee.setId(id);
        employee.setStatus(status);
        employeeMapper.updateEmployee(employee);
    }

    @Override
    public PageResult page(Integer page, Integer pageSize, String name) {
        PageHelper.startPage(page, pageSize);
        log.info("employeeService:员工分页查询，参数：page={},pageSize={},name={}", page, pageSize, name);
        List<Employee> list = employeeMapper.selectByPage(name);
        log.info("employeeService:员工分页查询Mapper，结果：{}", list);

        Page page1 = (Page) list;
        log.info("employeeService:员工分页查询，结果：{}", list);


        return new PageResult(page1.getTotal(),list);
    }

    @Override
    public void update(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO, employee);
        employeeMapper.updateEmployee( employee);
    }


    @Override
    public Employee getEmployeeById(Long id) {
         return employeeMapper.getEmployeeById(id);

    }

    /**
     * 新增员工
     * @param employee
     */
    @Override
    public void saveEmployee(EmployeeDTO employeeDto) {
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDto, employee);

        //设置默认密码
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes(StandardCharsets.UTF_8)));
        //设置账号状态
        employee.setStatus(StatusConstant.ENABLE);
        log.info("employeeService:新增员工，员工数据：{}", employee);
        employeeMapper.insert(employee);
    }

}
